./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product30.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cf1de70-5427-4bff-91e5-dc60cd5c0621/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cf1de70-5427-4bff-91e5-dc60cd5c0621/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cf1de70-5427-4bff-91e5-dc60cd5c0621/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cf1de70-5427-4bff-91e5-dc60cd5c0621/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cf1de70-5427-4bff-91e5-dc60cd5c0621/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cf1de70-5427-4bff-91e5-dc60cd5c0621/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b5032f6ecc7a7304ce28757cb2a6aad82a2091f27bc978e38426a37817981d0c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:35:51,615 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:35:51,618 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:35:51,685 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:35:51,686 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:35:51,691 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:35:51,694 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:35:51,699 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:35:51,703 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:35:51,712 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:35:51,716 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:35:51,719 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:35:51,719 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:35:51,723 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:35:51,727 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:35:51,734 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:35:51,736 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:35:51,737 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:35:51,745 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:35:51,750 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:35:51,757 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:35:51,758 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:35:51,763 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:35:51,764 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:35:51,773 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:35:51,774 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:35:51,774 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:35:51,777 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:35:51,778 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:35:51,780 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:35:51,781 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:35:51,782 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:35:51,785 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:35:51,787 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:35:51,789 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:35:51,789 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:35:51,790 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:35:51,791 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:35:51,791 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:35:51,792 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:35:51,793 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:35:51,794 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cf1de70-5427-4bff-91e5-dc60cd5c0621/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-20 23:35:51,865 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:35:51,865 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:35:51,866 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:35:51,867 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:35:51,868 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:35:51,868 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:35:51,869 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:35:51,869 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:35:51,869 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:35:51,870 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:35:51,871 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:35:51,871 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:35:51,872 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:35:51,872 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:35:51,872 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:35:51,873 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:35:51,873 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:35:51,873 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:35:51,874 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:35:51,875 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:35:51,875 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:35:51,875 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:35:51,876 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:35:51,876 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:35:51,876 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:35:51,876 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:35:51,878 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:35:51,879 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:35:51,879 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:35:51,879 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:35:51,880 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:35:51,880 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:35:51,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:35:51,881 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:35:51,881 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:35:51,882 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:35:51,882 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:35:51,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:35:51,882 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:35:51,883 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:35:51,883 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:35:51,883 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cf1de70-5427-4bff-91e5-dc60cd5c0621/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cf1de70-5427-4bff-91e5-dc60cd5c0621/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b5032f6ecc7a7304ce28757cb2a6aad82a2091f27bc978e38426a37817981d0c [2021-11-20 23:35:52,224 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:35:52,257 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:35:52,260 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:35:52,262 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:35:52,262 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:35:52,264 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cf1de70-5427-4bff-91e5-dc60cd5c0621/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/product-lines/elevator_spec1_product30.cil.c [2021-11-20 23:35:52,334 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cf1de70-5427-4bff-91e5-dc60cd5c0621/bin/utaipan-TEXQjIfE4P/data/daac4def3/ea021ca9072c49de96eda76b402c8f0f/FLAG8d72c1592 [2021-11-20 23:35:53,067 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:35:53,068 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cf1de70-5427-4bff-91e5-dc60cd5c0621/sv-benchmarks/c/product-lines/elevator_spec1_product30.cil.c [2021-11-20 23:35:53,105 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cf1de70-5427-4bff-91e5-dc60cd5c0621/bin/utaipan-TEXQjIfE4P/data/daac4def3/ea021ca9072c49de96eda76b402c8f0f/FLAG8d72c1592 [2021-11-20 23:35:53,263 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cf1de70-5427-4bff-91e5-dc60cd5c0621/bin/utaipan-TEXQjIfE4P/data/daac4def3/ea021ca9072c49de96eda76b402c8f0f [2021-11-20 23:35:53,266 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:35:53,267 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:35:53,272 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:35:53,273 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:35:53,276 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:35:53,277 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:35:53" (1/1) ... [2021-11-20 23:35:53,278 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@410eb24f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:53, skipping insertion in model container [2021-11-20 23:35:53,279 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:35:53" (1/1) ... [2021-11-20 23:35:53,286 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:35:53,372 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:35:53,568 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cf1de70-5427-4bff-91e5-dc60cd5c0621/sv-benchmarks/c/product-lines/elevator_spec1_product30.cil.c[1545,1558] [2021-11-20 23:35:53,940 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:35:53,954 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:35:53,985 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cf1de70-5427-4bff-91e5-dc60cd5c0621/sv-benchmarks/c/product-lines/elevator_spec1_product30.cil.c[1545,1558] [2021-11-20 23:35:54,106 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:35:54,146 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:35:54,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:54 WrapperNode [2021-11-20 23:35:54,147 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:35:54,149 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:35:54,149 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:35:54,150 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:35:54,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:54" (1/1) ... [2021-11-20 23:35:54,200 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:54" (1/1) ... [2021-11-20 23:35:54,260 INFO L137 Inliner]: procedures = 95, calls = 348, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 909 [2021-11-20 23:35:54,261 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:35:54,261 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:35:54,262 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:35:54,262 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:35:54,270 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:54" (1/1) ... [2021-11-20 23:35:54,271 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:54" (1/1) ... [2021-11-20 23:35:54,277 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:54" (1/1) ... [2021-11-20 23:35:54,277 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:54" (1/1) ... [2021-11-20 23:35:54,318 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:54" (1/1) ... [2021-11-20 23:35:54,343 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:54" (1/1) ... [2021-11-20 23:35:54,348 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:54" (1/1) ... [2021-11-20 23:35:54,374 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:35:54,375 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:35:54,375 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:35:54,375 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:35:54,376 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:54" (1/1) ... [2021-11-20 23:35:54,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:35:54,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cf1de70-5427-4bff-91e5-dc60cd5c0621/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:35:54,432 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cf1de70-5427-4bff-91e5-dc60cd5c0621/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:35:54,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cf1de70-5427-4bff-91e5-dc60cd5c0621/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:35:54,477 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-20 23:35:54,479 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-20 23:35:54,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:35:54,479 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-20 23:35:54,479 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-20 23:35:54,480 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-20 23:35:54,480 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-20 23:35:54,480 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-20 23:35:54,480 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-20 23:35:54,480 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-20 23:35:54,480 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-20 23:35:54,481 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-20 23:35:54,481 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-20 23:35:54,481 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2021-11-20 23:35:54,481 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2021-11-20 23:35:54,481 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-20 23:35:54,482 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-20 23:35:54,482 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-20 23:35:54,482 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-20 23:35:54,482 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-20 23:35:54,482 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-20 23:35:54,482 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-20 23:35:54,483 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-20 23:35:54,483 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-20 23:35:54,483 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-20 23:35:54,483 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-20 23:35:54,484 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-20 23:35:54,484 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-20 23:35:54,484 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-20 23:35:54,484 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-20 23:35:54,484 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-20 23:35:54,486 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-20 23:35:54,486 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-20 23:35:54,486 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-20 23:35:54,486 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-20 23:35:54,487 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-20 23:35:54,487 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-20 23:35:54,487 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-20 23:35:54,487 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-20 23:35:54,487 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-20 23:35:54,487 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-20 23:35:54,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:35:54,488 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-20 23:35:54,488 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-20 23:35:54,488 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-20 23:35:54,489 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-20 23:35:54,489 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-20 23:35:54,490 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-20 23:35:54,491 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-20 23:35:54,491 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-20 23:35:54,492 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2021-11-20 23:35:54,492 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2021-11-20 23:35:54,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:35:54,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:35:54,493 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-20 23:35:54,493 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-20 23:35:54,641 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:35:54,644 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:35:56,042 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:35:56,829 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:35:56,830 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 23:35:56,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:35:56 BoogieIcfgContainer [2021-11-20 23:35:56,836 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:35:56,838 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:35:56,838 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:35:56,842 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:35:56,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:35:53" (1/3) ... [2021-11-20 23:35:56,844 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@619a87c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:35:56, skipping insertion in model container [2021-11-20 23:35:56,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:54" (2/3) ... [2021-11-20 23:35:56,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@619a87c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:35:56, skipping insertion in model container [2021-11-20 23:35:56,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:35:56" (3/3) ... [2021-11-20 23:35:56,846 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product30.cil.c [2021-11-20 23:35:56,854 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:35:56,854 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:35:56,940 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:35:56,952 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 23:35:56,952 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:35:57,010 INFO L276 IsEmpty]: Start isEmpty. Operand has 390 states, 261 states have (on average 1.5862068965517242) internal successors, (414), 284 states have internal predecessors, (414), 101 states have call successors, (101), 26 states have call predecessors, (101), 26 states have return successors, (101), 94 states have call predecessors, (101), 101 states have call successors, (101) [2021-11-20 23:35:57,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-20 23:35:57,039 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:35:57,040 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:35:57,040 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:35:57,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:35:57,048 INFO L85 PathProgramCache]: Analyzing trace with hash -928472709, now seen corresponding path program 1 times [2021-11-20 23:35:57,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:35:57,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959942660] [2021-11-20 23:35:57,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:35:57,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:35:57,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:35:57,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 23:35:57,839 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:35:57,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959942660] [2021-11-20 23:35:57,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959942660] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:35:57,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:35:57,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 23:35:57,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690285954] [2021-11-20 23:35:57,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:35:57,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:35:57,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:35:57,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:35:57,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:35:57,903 INFO L87 Difference]: Start difference. First operand has 390 states, 261 states have (on average 1.5862068965517242) internal successors, (414), 284 states have internal predecessors, (414), 101 states have call successors, (101), 26 states have call predecessors, (101), 26 states have return successors, (101), 94 states have call predecessors, (101), 101 states have call successors, (101) Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-20 23:36:00,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:36:00,615 INFO L93 Difference]: Finished difference Result 1260 states and 2036 transitions. [2021-11-20 23:36:00,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:36:00,618 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 54 [2021-11-20 23:36:00,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:36:00,660 INFO L225 Difference]: With dead ends: 1260 [2021-11-20 23:36:00,661 INFO L226 Difference]: Without dead ends: 887 [2021-11-20 23:36:00,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:36:00,685 INFO L933 BasicCegarLoop]: 593 mSDtfsCounter, 1226 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 1388 mSolverCounterSat, 473 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1293 SdHoareTripleChecker+Valid, 1392 SdHoareTripleChecker+Invalid, 1861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 473 IncrementalHoareTripleChecker+Valid, 1388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:36:00,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1293 Valid, 1392 Invalid, 1861 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [473 Valid, 1388 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 23:36:00,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2021-11-20 23:36:00,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 800. [2021-11-20 23:36:00,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 561 states have (on average 1.6007130124777185) internal successors, (898), 591 states have internal predecessors, (898), 193 states have call successors, (193), 44 states have call predecessors, (193), 45 states have return successors, (195), 177 states have call predecessors, (195), 188 states have call successors, (195) [2021-11-20 23:36:00,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1286 transitions. [2021-11-20 23:36:00,887 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1286 transitions. Word has length 54 [2021-11-20 23:36:00,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:36:00,895 INFO L470 AbstractCegarLoop]: Abstraction has 800 states and 1286 transitions. [2021-11-20 23:36:00,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-20 23:36:00,896 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1286 transitions. [2021-11-20 23:36:00,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-20 23:36:00,912 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:00,912 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:36:00,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:36:00,914 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:36:00,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:00,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1757354683, now seen corresponding path program 1 times [2021-11-20 23:36:00,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:36:00,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079818957] [2021-11-20 23:36:00,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:00,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:36:01,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:01,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 23:36:01,274 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:36:01,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079818957] [2021-11-20 23:36:01,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079818957] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:36:01,275 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:36:01,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:36:01,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170010023] [2021-11-20 23:36:01,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:36:01,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:36:01,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:36:01,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:36:01,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:36:01,281 INFO L87 Difference]: Start difference. First operand 800 states and 1286 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 23:36:01,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:36:01,683 INFO L93 Difference]: Finished difference Result 1767 states and 2881 transitions. [2021-11-20 23:36:01,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:36:01,684 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 87 [2021-11-20 23:36:01,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:36:01,702 INFO L225 Difference]: With dead ends: 1767 [2021-11-20 23:36:01,702 INFO L226 Difference]: Without dead ends: 991 [2021-11-20 23:36:01,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:36:01,715 INFO L933 BasicCegarLoop]: 621 mSDtfsCounter, 177 mSDsluCounter, 1814 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 2332 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:36:01,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 2332 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 23:36:01,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2021-11-20 23:36:01,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 806. [2021-11-20 23:36:01,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 567 states have (on average 1.5943562610229276) internal successors, (904), 597 states have internal predecessors, (904), 193 states have call successors, (193), 44 states have call predecessors, (193), 45 states have return successors, (195), 177 states have call predecessors, (195), 188 states have call successors, (195) [2021-11-20 23:36:01,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1292 transitions. [2021-11-20 23:36:01,866 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1292 transitions. Word has length 87 [2021-11-20 23:36:01,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:36:01,868 INFO L470 AbstractCegarLoop]: Abstraction has 806 states and 1292 transitions. [2021-11-20 23:36:01,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 23:36:01,869 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1292 transitions. [2021-11-20 23:36:01,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-20 23:36:01,876 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:01,876 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:36:01,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 23:36:01,877 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:36:01,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:01,877 INFO L85 PathProgramCache]: Analyzing trace with hash -297931558, now seen corresponding path program 1 times [2021-11-20 23:36:01,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:36:01,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562055059] [2021-11-20 23:36:01,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:01,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:36:01,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:02,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 23:36:02,194 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:36:02,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562055059] [2021-11-20 23:36:02,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562055059] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:36:02,195 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:36:02,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 23:36:02,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963451455] [2021-11-20 23:36:02,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:36:02,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 23:36:02,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:36:02,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 23:36:02,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:36:02,196 INFO L87 Difference]: Start difference. First operand 806 states and 1292 transitions. Second operand has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-20 23:36:05,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:36:05,942 INFO L93 Difference]: Finished difference Result 2768 states and 4483 transitions. [2021-11-20 23:36:05,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 23:36:05,943 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) Word has length 88 [2021-11-20 23:36:05,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:36:06,019 INFO L225 Difference]: With dead ends: 2768 [2021-11-20 23:36:06,019 INFO L226 Difference]: Without dead ends: 1985 [2021-11-20 23:36:06,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-11-20 23:36:06,036 INFO L933 BasicCegarLoop]: 945 mSDtfsCounter, 1346 mSDsluCounter, 1745 mSDsCounter, 0 mSdLazyCounter, 4040 mSolverCounterSat, 709 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1421 SdHoareTripleChecker+Valid, 2593 SdHoareTripleChecker+Invalid, 4749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 709 IncrementalHoareTripleChecker+Valid, 4040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:36:06,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1421 Valid, 2593 Invalid, 4749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [709 Valid, 4040 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-20 23:36:06,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2021-11-20 23:36:06,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1798. [2021-11-20 23:36:06,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1798 states, 1232 states have (on average 1.5665584415584415) internal successors, (1930), 1304 states have internal predecessors, (1930), 474 states have call successors, (474), 79 states have call predecessors, (474), 91 states have return successors, (493), 447 states have call predecessors, (493), 469 states have call successors, (493) [2021-11-20 23:36:06,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1798 states to 1798 states and 2897 transitions. [2021-11-20 23:36:06,259 INFO L78 Accepts]: Start accepts. Automaton has 1798 states and 2897 transitions. Word has length 88 [2021-11-20 23:36:06,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:36:06,262 INFO L470 AbstractCegarLoop]: Abstraction has 1798 states and 2897 transitions. [2021-11-20 23:36:06,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-20 23:36:06,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1798 states and 2897 transitions. [2021-11-20 23:36:06,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-20 23:36:06,269 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:06,269 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:36:06,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 23:36:06,270 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:36:06,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:06,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1078003022, now seen corresponding path program 1 times [2021-11-20 23:36:06,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:36:06,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396837028] [2021-11-20 23:36:06,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:06,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:36:06,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:06,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 23:36:06,488 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:36:06,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396837028] [2021-11-20 23:36:06,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396837028] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:36:06,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:36:06,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 23:36:06,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278032297] [2021-11-20 23:36:06,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:36:06,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 23:36:06,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:36:06,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 23:36:06,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-20 23:36:06,492 INFO L87 Difference]: Start difference. First operand 1798 states and 2897 transitions. Second operand has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 6 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2021-11-20 23:36:10,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:36:10,108 INFO L93 Difference]: Finished difference Result 5045 states and 8154 transitions. [2021-11-20 23:36:10,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 23:36:10,114 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 6 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 89 [2021-11-20 23:36:10,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:36:10,143 INFO L225 Difference]: With dead ends: 5045 [2021-11-20 23:36:10,144 INFO L226 Difference]: Without dead ends: 3272 [2021-11-20 23:36:10,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2021-11-20 23:36:10,165 INFO L933 BasicCegarLoop]: 793 mSDtfsCounter, 1748 mSDsluCounter, 2521 mSDsCounter, 0 mSdLazyCounter, 3460 mSolverCounterSat, 608 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1813 SdHoareTripleChecker+Valid, 3181 SdHoareTripleChecker+Invalid, 4068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 608 IncrementalHoareTripleChecker+Valid, 3460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:36:10,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1813 Valid, 3181 Invalid, 4068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [608 Valid, 3460 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-20 23:36:10,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3272 states. [2021-11-20 23:36:10,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3272 to 3110. [2021-11-20 23:36:10,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3110 states, 2206 states have (on average 1.5897552130553037) internal successors, (3507), 2297 states have internal predecessors, (3507), 732 states have call successors, (732), 141 states have call predecessors, (732), 171 states have return successors, (795), 715 states have call predecessors, (795), 727 states have call successors, (795) [2021-11-20 23:36:10,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3110 states to 3110 states and 5034 transitions. [2021-11-20 23:36:10,465 INFO L78 Accepts]: Start accepts. Automaton has 3110 states and 5034 transitions. Word has length 89 [2021-11-20 23:36:10,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:36:10,466 INFO L470 AbstractCegarLoop]: Abstraction has 3110 states and 5034 transitions. [2021-11-20 23:36:10,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 6 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2021-11-20 23:36:10,466 INFO L276 IsEmpty]: Start isEmpty. Operand 3110 states and 5034 transitions. [2021-11-20 23:36:10,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-20 23:36:10,474 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:10,474 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:36:10,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 23:36:10,475 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:36:10,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:10,476 INFO L85 PathProgramCache]: Analyzing trace with hash 161028296, now seen corresponding path program 1 times [2021-11-20 23:36:10,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:36:10,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935081974] [2021-11-20 23:36:10,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:10,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:36:10,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:10,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 23:36:10,658 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:36:10,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935081974] [2021-11-20 23:36:10,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935081974] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:36:10,659 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:36:10,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 23:36:10,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35927436] [2021-11-20 23:36:10,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:36:10,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 23:36:10,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:36:10,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 23:36:10,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:36:10,662 INFO L87 Difference]: Start difference. First operand 3110 states and 5034 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-20 23:36:11,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:36:11,044 INFO L93 Difference]: Finished difference Result 5549 states and 9002 transitions. [2021-11-20 23:36:11,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:36:11,045 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) Word has length 94 [2021-11-20 23:36:11,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:36:11,123 INFO L225 Difference]: With dead ends: 5549 [2021-11-20 23:36:11,123 INFO L226 Difference]: Without dead ends: 3222 [2021-11-20 23:36:11,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:36:11,141 INFO L933 BasicCegarLoop]: 571 mSDtfsCounter, 7 mSDsluCounter, 2992 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3390 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:36:11,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 3390 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:36:11,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3222 states. [2021-11-20 23:36:11,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3222 to 3180. [2021-11-20 23:36:11,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3180 states, 2256 states have (on average 1.5766843971631206) internal successors, (3557), 2347 states have internal predecessors, (3557), 732 states have call successors, (732), 141 states have call predecessors, (732), 191 states have return successors, (845), 735 states have call predecessors, (845), 727 states have call successors, (845) [2021-11-20 23:36:11,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3180 states to 3180 states and 5134 transitions. [2021-11-20 23:36:11,402 INFO L78 Accepts]: Start accepts. Automaton has 3180 states and 5134 transitions. Word has length 94 [2021-11-20 23:36:11,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:36:11,404 INFO L470 AbstractCegarLoop]: Abstraction has 3180 states and 5134 transitions. [2021-11-20 23:36:11,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-20 23:36:11,405 INFO L276 IsEmpty]: Start isEmpty. Operand 3180 states and 5134 transitions. [2021-11-20 23:36:11,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-20 23:36:11,411 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:11,412 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:36:11,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 23:36:11,412 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:36:11,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:11,413 INFO L85 PathProgramCache]: Analyzing trace with hash 279441064, now seen corresponding path program 1 times [2021-11-20 23:36:11,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:36:11,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337014665] [2021-11-20 23:36:11,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:11,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:36:11,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:11,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 23:36:11,597 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:36:11,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337014665] [2021-11-20 23:36:11,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337014665] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:36:11,597 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:36:11,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 23:36:11,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140163536] [2021-11-20 23:36:11,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:36:11,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 23:36:11,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:36:11,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 23:36:11,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:36:11,599 INFO L87 Difference]: Start difference. First operand 3180 states and 5134 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-20 23:36:11,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:36:11,947 INFO L93 Difference]: Finished difference Result 5655 states and 9142 transitions. [2021-11-20 23:36:11,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:36:11,948 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) Word has length 94 [2021-11-20 23:36:11,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:36:11,973 INFO L225 Difference]: With dead ends: 5655 [2021-11-20 23:36:11,973 INFO L226 Difference]: Without dead ends: 3272 [2021-11-20 23:36:11,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:36:11,989 INFO L933 BasicCegarLoop]: 575 mSDtfsCounter, 6 mSDsluCounter, 3007 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 3409 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:36:11,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 3409 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:36:11,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3272 states. [2021-11-20 23:36:12,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3272 to 3190. [2021-11-20 23:36:12,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3190 states, 2266 states have (on average 1.5741394527802295) internal successors, (3567), 2347 states have internal predecessors, (3567), 732 states have call successors, (732), 141 states have call predecessors, (732), 191 states have return successors, (845), 745 states have call predecessors, (845), 727 states have call successors, (845) [2021-11-20 23:36:12,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3190 states to 3190 states and 5144 transitions. [2021-11-20 23:36:12,184 INFO L78 Accepts]: Start accepts. Automaton has 3190 states and 5144 transitions. Word has length 94 [2021-11-20 23:36:12,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:36:12,185 INFO L470 AbstractCegarLoop]: Abstraction has 3190 states and 5144 transitions. [2021-11-20 23:36:12,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-20 23:36:12,185 INFO L276 IsEmpty]: Start isEmpty. Operand 3190 states and 5144 transitions. [2021-11-20 23:36:12,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-20 23:36:12,189 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:12,189 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:36:12,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 23:36:12,190 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:36:12,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:12,190 INFO L85 PathProgramCache]: Analyzing trace with hash -338251077, now seen corresponding path program 1 times [2021-11-20 23:36:12,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:36:12,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7315745] [2021-11-20 23:36:12,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:12,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:36:12,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:12,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 23:36:12,337 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:36:12,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7315745] [2021-11-20 23:36:12,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7315745] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:36:12,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:36:12,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 23:36:12,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146035249] [2021-11-20 23:36:12,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:36:12,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 23:36:12,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:36:12,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 23:36:12,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:36:12,340 INFO L87 Difference]: Start difference. First operand 3190 states and 5144 transitions. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-20 23:36:12,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:36:12,645 INFO L93 Difference]: Finished difference Result 5673 states and 9160 transitions. [2021-11-20 23:36:12,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:36:12,646 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) Word has length 93 [2021-11-20 23:36:12,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:36:12,673 INFO L225 Difference]: With dead ends: 5673 [2021-11-20 23:36:12,673 INFO L226 Difference]: Without dead ends: 3282 [2021-11-20 23:36:12,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:36:12,689 INFO L933 BasicCegarLoop]: 571 mSDtfsCounter, 7 mSDsluCounter, 2992 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3390 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:36:12,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 3390 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:36:12,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3282 states. [2021-11-20 23:36:12,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3282 to 3200. [2021-11-20 23:36:12,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3200 states, 2276 states have (on average 1.5716168717047452) internal successors, (3577), 2347 states have internal predecessors, (3577), 732 states have call successors, (732), 141 states have call predecessors, (732), 191 states have return successors, (845), 755 states have call predecessors, (845), 727 states have call successors, (845) [2021-11-20 23:36:12,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3200 states to 3200 states and 5154 transitions. [2021-11-20 23:36:12,928 INFO L78 Accepts]: Start accepts. Automaton has 3200 states and 5154 transitions. Word has length 93 [2021-11-20 23:36:12,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:36:12,928 INFO L470 AbstractCegarLoop]: Abstraction has 3200 states and 5154 transitions. [2021-11-20 23:36:12,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-20 23:36:12,929 INFO L276 IsEmpty]: Start isEmpty. Operand 3200 states and 5154 transitions. [2021-11-20 23:36:12,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-20 23:36:12,933 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:12,933 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:36:12,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 23:36:12,933 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:36:12,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:12,934 INFO L85 PathProgramCache]: Analyzing trace with hash -68575904, now seen corresponding path program 1 times [2021-11-20 23:36:12,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:36:12,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534118595] [2021-11-20 23:36:12,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:12,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:36:12,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:13,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 23:36:13,087 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:36:13,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534118595] [2021-11-20 23:36:13,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534118595] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:36:13,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:36:13,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 23:36:13,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421770415] [2021-11-20 23:36:13,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:36:13,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 23:36:13,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:36:13,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 23:36:13,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:36:13,090 INFO L87 Difference]: Start difference. First operand 3200 states and 5154 transitions. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 7 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (17), 8 states have call predecessors, (17), 6 states have call successors, (17) [2021-11-20 23:36:15,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:36:15,483 INFO L93 Difference]: Finished difference Result 7984 states and 12948 transitions. [2021-11-20 23:36:15,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 23:36:15,484 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 7 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (17), 8 states have call predecessors, (17), 6 states have call successors, (17) Word has length 98 [2021-11-20 23:36:15,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:36:15,531 INFO L225 Difference]: With dead ends: 7984 [2021-11-20 23:36:15,531 INFO L226 Difference]: Without dead ends: 5343 [2021-11-20 23:36:15,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-20 23:36:15,555 INFO L933 BasicCegarLoop]: 884 mSDtfsCounter, 1718 mSDsluCounter, 912 mSDsCounter, 0 mSdLazyCounter, 2027 mSolverCounterSat, 748 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1883 SdHoareTripleChecker+Valid, 1738 SdHoareTripleChecker+Invalid, 2775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 748 IncrementalHoareTripleChecker+Valid, 2027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:36:15,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1883 Valid, 1738 Invalid, 2775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [748 Valid, 2027 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-20 23:36:15,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5343 states. [2021-11-20 23:36:15,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5343 to 5204. [2021-11-20 23:36:15,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5204 states, 3627 states have (on average 1.533498759305211) internal successors, (5562), 3768 states have internal predecessors, (5562), 1246 states have call successors, (1246), 250 states have call predecessors, (1246), 330 states have return successors, (1466), 1262 states have call predecessors, (1466), 1241 states have call successors, (1466) [2021-11-20 23:36:15,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5204 states to 5204 states and 8274 transitions. [2021-11-20 23:36:15,951 INFO L78 Accepts]: Start accepts. Automaton has 5204 states and 8274 transitions. Word has length 98 [2021-11-20 23:36:15,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:36:15,951 INFO L470 AbstractCegarLoop]: Abstraction has 5204 states and 8274 transitions. [2021-11-20 23:36:15,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 7 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (17), 8 states have call predecessors, (17), 6 states have call successors, (17) [2021-11-20 23:36:15,952 INFO L276 IsEmpty]: Start isEmpty. Operand 5204 states and 8274 transitions. [2021-11-20 23:36:15,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-20 23:36:15,955 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:15,955 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:36:15,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 23:36:15,956 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:36:15,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:15,957 INFO L85 PathProgramCache]: Analyzing trace with hash -2134922000, now seen corresponding path program 1 times [2021-11-20 23:36:15,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:36:15,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408973142] [2021-11-20 23:36:15,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:15,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:36:16,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:16,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 23:36:16,107 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:36:16,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408973142] [2021-11-20 23:36:16,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408973142] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:36:16,107 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:36:16,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 23:36:16,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694535292] [2021-11-20 23:36:16,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:36:16,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:36:16,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:36:16,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:36:16,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:36:16,110 INFO L87 Difference]: Start difference. First operand 5204 states and 8274 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 5 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-20 23:36:19,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:36:19,359 INFO L93 Difference]: Finished difference Result 17057 states and 27861 transitions. [2021-11-20 23:36:19,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 23:36:19,360 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 5 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) Word has length 101 [2021-11-20 23:36:19,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:36:19,459 INFO L225 Difference]: With dead ends: 17057 [2021-11-20 23:36:19,459 INFO L226 Difference]: Without dead ends: 11878 [2021-11-20 23:36:19,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-20 23:36:19,508 INFO L933 BasicCegarLoop]: 1052 mSDtfsCounter, 2203 mSDsluCounter, 1287 mSDsCounter, 0 mSdLazyCounter, 2472 mSolverCounterSat, 986 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2316 SdHoareTripleChecker+Valid, 2282 SdHoareTripleChecker+Invalid, 3458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 986 IncrementalHoareTripleChecker+Valid, 2472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-20 23:36:19,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2316 Valid, 2282 Invalid, 3458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [986 Valid, 2472 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-20 23:36:19,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11878 states. [2021-11-20 23:36:20,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11878 to 10987. [2021-11-20 23:36:20,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10987 states, 7507 states have (on average 1.5255095244438523) internal successors, (11452), 7910 states have internal predecessors, (11452), 2806 states have call successors, (2806), 508 states have call predecessors, (2806), 673 states have return successors, (3468), 2799 states have call predecessors, (3468), 2801 states have call successors, (3468) [2021-11-20 23:36:20,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10987 states to 10987 states and 17726 transitions. [2021-11-20 23:36:20,339 INFO L78 Accepts]: Start accepts. Automaton has 10987 states and 17726 transitions. Word has length 101 [2021-11-20 23:36:20,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:36:20,340 INFO L470 AbstractCegarLoop]: Abstraction has 10987 states and 17726 transitions. [2021-11-20 23:36:20,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 5 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-20 23:36:20,341 INFO L276 IsEmpty]: Start isEmpty. Operand 10987 states and 17726 transitions. [2021-11-20 23:36:20,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-20 23:36:20,345 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:20,345 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:36:20,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 23:36:20,346 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:36:20,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:20,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1945682801, now seen corresponding path program 1 times [2021-11-20 23:36:20,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:36:20,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278933443] [2021-11-20 23:36:20,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:20,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:36:20,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:20,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 23:36:20,511 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:36:20,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278933443] [2021-11-20 23:36:20,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278933443] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:36:20,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:36:20,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 23:36:20,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669433417] [2021-11-20 23:36:20,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:36:20,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 23:36:20,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:36:20,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 23:36:20,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:36:20,514 INFO L87 Difference]: Start difference. First operand 10987 states and 17726 transitions. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-20 23:36:22,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:36:22,878 INFO L93 Difference]: Finished difference Result 21680 states and 35142 transitions. [2021-11-20 23:36:22,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 23:36:22,879 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) Word has length 102 [2021-11-20 23:36:22,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:36:22,953 INFO L225 Difference]: With dead ends: 21680 [2021-11-20 23:36:22,954 INFO L226 Difference]: Without dead ends: 12199 [2021-11-20 23:36:22,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-20 23:36:22,992 INFO L933 BasicCegarLoop]: 631 mSDtfsCounter, 993 mSDsluCounter, 1408 mSDsCounter, 0 mSdLazyCounter, 2261 mSolverCounterSat, 429 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1069 SdHoareTripleChecker+Valid, 1960 SdHoareTripleChecker+Invalid, 2690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 429 IncrementalHoareTripleChecker+Valid, 2261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:36:22,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1069 Valid, 1960 Invalid, 2690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [429 Valid, 2261 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-20 23:36:23,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12199 states. [2021-11-20 23:36:23,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12199 to 11221. [2021-11-20 23:36:23,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11221 states, 7669 states have (on average 1.5217107836745338) internal successors, (11670), 8100 states have internal predecessors, (11670), 2820 states have call successors, (2820), 540 states have call predecessors, (2820), 731 states have return successors, (3556), 2811 states have call predecessors, (3556), 2815 states have call successors, (3556) [2021-11-20 23:36:23,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11221 states to 11221 states and 18046 transitions. [2021-11-20 23:36:23,944 INFO L78 Accepts]: Start accepts. Automaton has 11221 states and 18046 transitions. Word has length 102 [2021-11-20 23:36:23,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:36:23,944 INFO L470 AbstractCegarLoop]: Abstraction has 11221 states and 18046 transitions. [2021-11-20 23:36:23,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-20 23:36:23,945 INFO L276 IsEmpty]: Start isEmpty. Operand 11221 states and 18046 transitions. [2021-11-20 23:36:23,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-20 23:36:23,949 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:23,950 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:36:23,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 23:36:23,950 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:36:23,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:23,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1080847228, now seen corresponding path program 1 times [2021-11-20 23:36:23,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:36:23,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383912522] [2021-11-20 23:36:23,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:23,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:36:24,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:24,249 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 23:36:24,250 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:36:24,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383912522] [2021-11-20 23:36:24,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383912522] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:36:24,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:36:24,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 23:36:24,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306342057] [2021-11-20 23:36:24,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:36:24,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:36:24,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:36:24,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:36:24,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:36:24,252 INFO L87 Difference]: Start difference. First operand 11221 states and 18046 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-20 23:36:25,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:36:25,194 INFO L93 Difference]: Finished difference Result 11347 states and 18255 transitions. [2021-11-20 23:36:25,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:36:25,195 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 106 [2021-11-20 23:36:25,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:36:25,263 INFO L225 Difference]: With dead ends: 11347 [2021-11-20 23:36:25,263 INFO L226 Difference]: Without dead ends: 11332 [2021-11-20 23:36:25,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:36:25,270 INFO L933 BasicCegarLoop]: 568 mSDtfsCounter, 697 mSDsluCounter, 1003 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 698 SdHoareTripleChecker+Valid, 1504 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:36:25,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [698 Valid, 1504 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 23:36:25,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11332 states. [2021-11-20 23:36:25,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11332 to 11229. [2021-11-20 23:36:25,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11229 states, 7677 states have (on average 1.521167122573922) internal successors, (11678), 8108 states have internal predecessors, (11678), 2820 states have call successors, (2820), 540 states have call predecessors, (2820), 731 states have return successors, (3556), 2811 states have call predecessors, (3556), 2815 states have call successors, (3556) [2021-11-20 23:36:26,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11229 states to 11229 states and 18054 transitions. [2021-11-20 23:36:26,141 INFO L78 Accepts]: Start accepts. Automaton has 11229 states and 18054 transitions. Word has length 106 [2021-11-20 23:36:26,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:36:26,143 INFO L470 AbstractCegarLoop]: Abstraction has 11229 states and 18054 transitions. [2021-11-20 23:36:26,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-20 23:36:26,144 INFO L276 IsEmpty]: Start isEmpty. Operand 11229 states and 18054 transitions. [2021-11-20 23:36:26,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-20 23:36:26,148 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:26,148 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:36:26,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 23:36:26,149 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:36:26,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:26,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1244308750, now seen corresponding path program 1 times [2021-11-20 23:36:26,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:36:26,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303454760] [2021-11-20 23:36:26,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:26,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:36:26,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:26,339 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 23:36:26,339 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:36:26,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303454760] [2021-11-20 23:36:26,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303454760] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:36:26,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:36:26,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-20 23:36:26,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654914926] [2021-11-20 23:36:26,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:36:26,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 23:36:26,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:36:26,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 23:36:26,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-11-20 23:36:26,342 INFO L87 Difference]: Start difference. First operand 11229 states and 18054 transitions. Second operand has 13 states, 11 states have (on average 6.090909090909091) internal successors, (67), 11 states have internal predecessors, (67), 5 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (20), 6 states have call predecessors, (20), 4 states have call successors, (20) [2021-11-20 23:36:31,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:36:31,533 INFO L93 Difference]: Finished difference Result 12417 states and 19864 transitions. [2021-11-20 23:36:31,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-20 23:36:31,539 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 6.090909090909091) internal successors, (67), 11 states have internal predecessors, (67), 5 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (20), 6 states have call predecessors, (20), 4 states have call successors, (20) Word has length 112 [2021-11-20 23:36:31,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:36:31,606 INFO L225 Difference]: With dead ends: 12417 [2021-11-20 23:36:31,606 INFO L226 Difference]: Without dead ends: 12400 [2021-11-20 23:36:31,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=375, Invalid=2277, Unknown=0, NotChecked=0, Total=2652 [2021-11-20 23:36:31,615 INFO L933 BasicCegarLoop]: 865 mSDtfsCounter, 2718 mSDsluCounter, 3631 mSDsCounter, 0 mSdLazyCounter, 7600 mSolverCounterSat, 1584 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2744 SdHoareTripleChecker+Valid, 4292 SdHoareTripleChecker+Invalid, 9184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1584 IncrementalHoareTripleChecker+Valid, 7600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:36:31,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2744 Valid, 4292 Invalid, 9184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1584 Valid, 7600 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-11-20 23:36:31,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12400 states. [2021-11-20 23:36:32,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12400 to 11869. [2021-11-20 23:36:32,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11869 states, 8172 states have (on average 1.5277777777777777) internal successors, (12485), 8599 states have internal predecessors, (12485), 2861 states have call successors, (2861), 645 states have call predecessors, (2861), 835 states have return successors, (3608), 2855 states have call predecessors, (3608), 2856 states have call successors, (3608) [2021-11-20 23:36:32,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11869 states to 11869 states and 18954 transitions. [2021-11-20 23:36:32,528 INFO L78 Accepts]: Start accepts. Automaton has 11869 states and 18954 transitions. Word has length 112 [2021-11-20 23:36:32,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:36:32,529 INFO L470 AbstractCegarLoop]: Abstraction has 11869 states and 18954 transitions. [2021-11-20 23:36:32,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 6.090909090909091) internal successors, (67), 11 states have internal predecessors, (67), 5 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (20), 6 states have call predecessors, (20), 4 states have call successors, (20) [2021-11-20 23:36:32,530 INFO L276 IsEmpty]: Start isEmpty. Operand 11869 states and 18954 transitions. [2021-11-20 23:36:32,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-20 23:36:32,537 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:32,537 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:36:32,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 23:36:32,538 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:36:32,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:32,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1105542410, now seen corresponding path program 1 times [2021-11-20 23:36:32,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:36:32,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684710164] [2021-11-20 23:36:32,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:32,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:36:32,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:32,810 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 23:36:32,810 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:36:32,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684710164] [2021-11-20 23:36:32,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684710164] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:36:32,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:36:32,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 23:36:32,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625818407] [2021-11-20 23:36:32,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:36:32,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 23:36:32,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:36:32,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 23:36:32,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-20 23:36:32,814 INFO L87 Difference]: Start difference. First operand 11869 states and 18954 transitions. Second operand has 9 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 7 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2021-11-20 23:36:36,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:36:36,653 INFO L93 Difference]: Finished difference Result 33640 states and 54403 transitions. [2021-11-20 23:36:36,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 23:36:36,653 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 7 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) Word has length 119 [2021-11-20 23:36:36,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:36:36,786 INFO L225 Difference]: With dead ends: 33640 [2021-11-20 23:36:36,786 INFO L226 Difference]: Without dead ends: 21798 [2021-11-20 23:36:36,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-11-20 23:36:36,839 INFO L933 BasicCegarLoop]: 1010 mSDtfsCounter, 3832 mSDsluCounter, 1345 mSDsCounter, 0 mSdLazyCounter, 2645 mSolverCounterSat, 1582 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3902 SdHoareTripleChecker+Valid, 2289 SdHoareTripleChecker+Invalid, 4227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1582 IncrementalHoareTripleChecker+Valid, 2645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:36:36,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3902 Valid, 2289 Invalid, 4227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1582 Valid, 2645 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-20 23:36:36,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21798 states. [2021-11-20 23:36:37,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21798 to 19127. [2021-11-20 23:36:37,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19127 states, 12999 states have (on average 1.5361950919301486) internal successors, (19969), 13831 states have internal predecessors, (19969), 4804 states have call successors, (4804), 1006 states have call predecessors, (4804), 1323 states have return successors, (6076), 4632 states have call predecessors, (6076), 4799 states have call successors, (6076) [2021-11-20 23:36:38,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19127 states to 19127 states and 30849 transitions. [2021-11-20 23:36:38,050 INFO L78 Accepts]: Start accepts. Automaton has 19127 states and 30849 transitions. Word has length 119 [2021-11-20 23:36:38,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:36:38,050 INFO L470 AbstractCegarLoop]: Abstraction has 19127 states and 30849 transitions. [2021-11-20 23:36:38,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 7 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2021-11-20 23:36:38,051 INFO L276 IsEmpty]: Start isEmpty. Operand 19127 states and 30849 transitions. [2021-11-20 23:36:38,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-20 23:36:38,056 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:38,056 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:36:38,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 23:36:38,057 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:36:38,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:38,057 INFO L85 PathProgramCache]: Analyzing trace with hash 670698030, now seen corresponding path program 1 times [2021-11-20 23:36:38,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:36:38,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367256173] [2021-11-20 23:36:38,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:38,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:36:38,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:38,809 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 23:36:38,810 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:36:38,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367256173] [2021-11-20 23:36:38,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367256173] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:36:38,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41105922] [2021-11-20 23:36:38,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:38,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:36:38,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cf1de70-5427-4bff-91e5-dc60cd5c0621/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:36:38,813 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cf1de70-5427-4bff-91e5-dc60cd5c0621/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:36:38,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cf1de70-5427-4bff-91e5-dc60cd5c0621/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 23:36:39,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:39,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 2114 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-20 23:36:39,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:36:42,284 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 23:36:42,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:36:45,712 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 23:36:45,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41105922] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:36:45,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [346573186] [2021-11-20 23:36:45,740 INFO L159 IcfgInterpreter]: Started Sifa with 112 locations of interest [2021-11-20 23:36:45,741 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:36:45,746 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:36:45,752 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:36:45,753 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:38:15,275 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 592 for LOIs [2021-11-20 23:40:28,240 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 592 for LOIs [2021-11-20 23:46:46,375 INFO L197 IcfgInterpreter]: Interpreting procedure areDoorsOpen with input of size 443 for LOIs [2021-11-20 23:46:50,831 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__twothirdsfull with input of size 587 for LOIs